21.
|
A
boat covers a certain distance downstream in I hour, while it comes back in
1½ hours. If the speed of the stream be 3 kmph. what is the speed of the boat
in still Water?
|
|
A. 12kmph
|
B. 13kmph
|
|
|
C.
15kmph
|
D. 16kmph
|
|
22.
A man rows 13 km upstream in 5 hours and also 28 km downstream in 5 hours. The
velpciy of the stream is :. [Assistant Grade]
1.5
km/hr 2.5 km/hr
2
mk/hr 3 km/hr
23.
|
A boat running upstream takes 8 hours 48 minutes
to cover a certain distance, while it take 4 hours to cover the same distance
running downstream. What is the ratio between the speed of the boat and speed
of the water current respectively?
|
|
·
A. 1:3
·
B. 3:8
·
C. 6:3
·
D. 8:3
|
24.A
man can row 10 kmph in still water and the river is running at 2 kmph. If the man
takes 1 hr to row to a place and back, how far is the place?
[A]
4.8
[C]
5
[B]
4.5
[D]
5.6
25.
|
A
man's speed with the current is 15 km/hr and the speed of the current is 2.5
km/hr The man's speed against the current is
|
|
A. 8.5 km/hr
|
B. 9 km/hr
|
|
|
C.
10 km/hr
|
D. 12.5 km/hr
|
|
|
|
|
|
|
26.
A man rows 750 m in 675 seconds against the stream and returns in 7 and half
minutes. His rowing speed in still water is: . [Assistant Grade]
3
km/hr 5 km/hr
4
km/hr 6 km/hr
27.
A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and
comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr)
is:
A. 4 B. 5
C. 6 D. 10
28.
A man can row a boat at 10 kmph in still water. If the speed of the stream is 6
kmph, the time taken to row a distance of 80 km down thestream is : . [Central
Excise ]
8
hours 10 hours
5
hours 20 hours
29.
|
In
one hour, a boat goes 11 km along the steram and 5 km against the stream. The
speed of the boat in still waer (in km/hr) is:
|
|
·
A. 2
·
B. 4
·
C. 8
·
D. 12
|
30.
|
A
man can row upstream at 7 kmph and downstream at 10 kmph.Find man's rate in
still water and the rate of current?
|
|
A. 1.2 km/hr
|
B.
1.5 km/hr
|
|
|
C. 1.6 km/hr
|
D. 1.8 km/hr
|
|
